Everyone loves the sturdy tips of the Pentel Slicci, and everyone loves their fantastic color line. This device makes it possible to combine your favorite characteristics to create a customizable Slicci gel multi-pen. Just pop in the ink color cartridges of your choice. You can choose colors from Carrot Orange to Sky Blue as well as different tip sizes. It's a perfect way to customize a pen to your taste. Teachers who prefer not to use red ink love this pen, as do lawyers who need to color code facts as they read through documents.